CN101279752A - Novel process for producing kalium sulphuricum with waste sulfuric acid and straw - Google Patents
Novel process for producing kalium sulphuricum with waste sulfuric acid and straw Download PDFInfo
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- CN101279752A CN101279752A CNA2008101105541A CN200810110554A CN101279752A CN 101279752 A CN101279752 A CN 101279752A CN A2008101105541 A CNA2008101105541 A CN A2008101105541A CN 200810110554 A CN200810110554 A CN 200810110554A CN 101279752 A CN101279752 A CN 101279752A
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- straw
- novel process
- waste acid
- neutralization
- tartar
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Abstract
The invention belongs to a novel process for producing potassium sulfate by utilizing waste sulfuric acid and straws, which is characterized in that: the process includes procedures of straw selection, burning, leaching, neutralization, concentration, crystallization, filtration and drying by rotation. The leaching procedure adopts the agitation in a blender for two to four hours, the proportion of the liquor to be leached may reach above 24Be`, the neutralization procedure adopts the waste sulfuric acid with the concentration of from 9 to 92 percent and pH value of between 2 and 6, the concentration procedure is conducted in an evaporator aiming to reach the saturation state, the crystallization procedure adopts a crystallizing tank in which the solution can be agitated, and the crystallized solution is cooled by agitation. The process has advantages of broad materials, being renewable and inexhaustible, waste utilization, low cost, reduced environmental pollution, small investment and fast effect, and is applied to the potasium fertilizer production of village and township enterprises.
Description
Technical field
The present invention relates to the production method of potassium sulfate fertilizers, is that a kind of sulfur waste acid and straw of utilizing produced the vitriolate of tartar novel process
Background technology
At present, potassium sulfate fertilizers all is to utilize potassium ore deposit and sulfuric acid reaction to make, because China's potassium ore resources lacks, causes potash fertilizer to yield poorly, and supply falls short of demand.Sulfur waste acid has in steel mill, coke-oven plant, chemical plant, bio-pharmaceuticals factory, Electroplate Factory and hot candied factory, and concentration is that the sulfur waste acid major part of 9-92% can't be utilized again, the direct discharging that has, have in adding alkali and the back discharge, both wasted resource, polluted environment again.Crop stalk just all is, is renewable resources, and it is abundant that straw contains potassium, some straw ash contains potassium up to 20-36%, and these resources are not made the best use of everything, and a part is worked as bavin and burnt, another part has been burnt when the summer harvest and autumn harvest in the fields, i.e. polluted air, fire hazardous again.
Summary of the invention
The purpose of this invention is to provide a kind of sulfur waste acid and straw of utilizing and produce the vitriolate of tartar novel process, can't utilize to solve sulfur waste acid again, discharging had not only been wasted resource but also contaminate environment, and crop stalk is not made the best use of everything and the potash fertilizer problem that supply falls short of demand.
The object of the present invention is achieved like this, this technology comprises the straw selection, burning, lixiviate, neutralization, concentrate, crystallization, filtration, drying operation, lixiviate in stirrer, stirred 2-4 hour, treat vat liquor proportion reach 24Be ' when above only, it is the sulfur waste acid of 9-92% that concentration is adopted in neutralization, PH=2-6 concentrates and uses vaporizer, is concentrated to state of saturation and ends, the crystallizer that crystallization adopts band to stir stirs crystallisation by cooling.
Straw adopts sunflower pole, tobacco bar, seeds of a tung oil tree shell, corn stalk, cotton Siberian cocklebur shell, sorghum rod, soybean stem, pod, straw and wheat straw, and all contain the higher crop stalk of potassium.
With chemical equation its mechanism is described below
K
2O+H
2O→2KOH
2KOH+H
2SO
4→K
2SO
4+2H
2O
The present invention compared with prior art has the following advantages: acid of (1) sulfur waste and straw are renewable, inexhaustible; (2) utilize sulfur waste acid and straw to produce the vitriolate of tartar utilization of waste material, turn waste into wealth, can reduce environmental pollution atmosphere and water resources; (3) it is low to utilize sulfur waste acid and straw to produce the vitriolate of tartar cost, and per ton cost is no more than 1200 yuan; (4) technology is simple, does not have specific installation, less investment, and instant effect is convenient to promote.
Description of drawings
Fig. 1 utilizes sulfur waste acid and straw to produce the potassium sulfate process flow process
Embodiment
Fig. 1 process flow sheet comprises straw selection, burning, lixiviate, neutralization, concentrates, crystallization, filtration, drying operation.
Specification
1, straw is selected: select for use to contain the higher crop stalk of potassium, as sunflower pole, tobacco bar, seeds of a tung oil tree shell, corn stalk, cotton Siberian cocklebur shell, sorghum rod, straw, soybean stem, pod and, wheat straw.
2, burning: roasting kiln and vaporizer are connected as a single entity, and can make full use of heat energy.
3, lixiviate: straw ash can be with own incendiary straw ash, perhaps with straw generating incendiary straw ash, and the straw ash of collecting, straw ash is put into stirrer, in grey: the ratio of water=1: 1.2-1.5 adds water, stir and soaked 2-4 hour, it is above only to treat that vat liquor proportion reaches 24Be ', is preferably between the 26-30Be ', lime-ash washes with water 3-4 time, the washings that obtains returns the lixiviate step, is used for the lixiviate straw ash, and the residue lime-ash can be produced white carbon black.
4, neutralization: vat liquor is put into acidproof stirrer, stir neutralization, pH value is controlled at 2-6, preferably PH=4-6.
5, concentrate: the potassium sulfate solution of becoming reconciled in inciting somebody to action is put into vaporizer and is evaporated, and is concentrated to state of saturation and ends.
6, crystallization; With saturated vitriolate of tartar hot solution, introduce the crystallization cylinder, crystallisation by cooling under condition of stirring.
7, filter; With crystalline vitriolate of tartar filter, filter cloth or strainer filtering are got xln, and mother liquor turns back to vaporizer.
8, dry: xln is dried with drier.
Claims (4)
1, a kind of sulfur waste acid and straw of utilizing produced the vitriolate of tartar novel process, it is characterized in that: this technology comprises that straw selects, burning, lixiviate, neutralization, concentrate, crystallization, filtration, drying operation, lixiviate is in stirrer, stirred 2-4 hour, it is above only to treat that vat liquor proportion reaches 24Be ', and it is the sulfur waste acid of 9-92% that concentration is adopted in neutralization, PH=2-6, be concentrated in the vaporizer, be concentrated to state of saturation, the crystallizer that crystallization adopts band to stir stirs crystallisation by cooling.
2, sulfur waste acid and the straw production vitriolate of tartar novel process utilized according to claim 1 is characterized in that: straw adopts sunflower pole, tobacco bar, and all contain the higher crop stalk of potassium seeds of a tung oil tree shell, corn stalk, cotton Siberian cocklebur shell, sorghum rod, soybean stem, pod, straw and wheat straw.
3, sulfur waste acid and the straw of utilizing according to claim 1 produced the vitriolate of tartar novel process, and it is characterized in that: vat liquor proportion is preferably between the 26-30Be '.
4, sulfur waste acid and the straw of utilizing according to claim 1 produced the vitriolate of tartar novel process, and it is characterized in that: neutralization reaction, pH value preferably are controlled at PH=4-6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008101105541A CN101279752A (en) | 2008-06-03 | 2008-06-03 | Novel process for producing kalium sulphuricum with waste sulfuric acid and straw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008101105541A CN101279752A (en) | 2008-06-03 | 2008-06-03 | Novel process for producing kalium sulphuricum with waste sulfuric acid and straw |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101279752A true CN101279752A (en) | 2008-10-08 |
Family
ID=40012457
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008101105541A Pending CN101279752A (en) | 2008-06-03 | 2008-06-03 | Novel process for producing kalium sulphuricum with waste sulfuric acid and straw |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101279752A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103130248A (en) * | 2013-03-06 | 2013-06-05 | 昆明理工大学 | Method for preparing potassium salt from biomass fuel boiler ash |
| CN104445441A (en) * | 2014-11-14 | 2015-03-25 | 河南省煤气（集团）有限责任公司 | Method for producing polymeric aluminium ferric sulfate solution from industrial waste sulfuric acid generated during purification of acetylene gas and red mud |
| CN111302363A (en) * | 2020-04-14 | 2020-06-19 | 成都华融化工有限公司 | Method for recycling waste sulfuric acid in chlor-alkali industry |
-
2008
- 2008-06-03 CN CNA2008101105541A patent/CN101279752A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103130248A (en) * | 2013-03-06 | 2013-06-05 | 昆明理工大学 | Method for preparing potassium salt from biomass fuel boiler ash |
| CN104445441A (en) * | 2014-11-14 | 2015-03-25 | 河南省煤气（集团）有限责任公司 | Method for producing polymeric aluminium ferric sulfate solution from industrial waste sulfuric acid generated during purification of acetylene gas and red mud |
| CN111302363A (en) * | 2020-04-14 | 2020-06-19 | 成都华融化工有限公司 | Method for recycling waste sulfuric acid in chlor-alkali industry |
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Open date: 20081008 |